An antenna is connected to a spectrum analyzer using a 20 meters coaxial cable to measure...

  

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An antenna is connected to a spectrum analyzer using a 20 meters coaxial cable to measure the radiated emission from an equipment under test (EUT), as shown in Figure Q9. The measurement distance is 10 meter. The loss of the coaxial cable is 0.2 dB and 0.32 dB per meter at 100 MHz and 250 MHz. The receiving antenna provides an output voltage at 0.62 V and 0.55 V for every V/m of incident electric field for 100 MHz and 250 MHz, respectively. The reading on the spectrum analyzer for both frequencies is 24 dBμV. (a) Determine the measured electric field strength at both frequencies in dBµV/m. (b) If the device is tested for compliance with CISPR 22 Class B, determine whether the device pass or fail the emission test. EUT 10m- Figure Q9 Frequency (MHz) 30-230 230-1000 -20m- dBμV/m 40.5 47.5 Spectrum Analyzer Table Q9: CISPR 22 Radiated Emission Limit for Class B ITE Equipment (3m) An antenna is connected to a spectrum analyzer using a 20 meters coaxial cable to measure the radiated emission from an equipment under test (EUT), as shown in Figure Q9. The measurement distance is 10 meter. The loss of the coaxial cable is 0.2 dB and 0.32 dB per meter at 100 MHz and 250 MHz. The receiving antenna provides an output voltage at 0.62 V and 0.55 V for every V/m of incident electric field for 100 MHz and 250 MHz, respectively. The reading on the spectrum analyzer for both frequencies is 24 dBμV. (a) Determine the measured electric field strength at both frequencies in dBµV/m. (b) If the device is tested for compliance with CISPR 22 Class B, determine whether the device pass or fail the emission test. EUT 10m- Figure Q9 Frequency (MHz) 30-230 230-1000 -20m- dBμV/m 40.5 47.5 Spectrum Analyzer Table Q9: CISPR 22 Radiated Emission Limit for Class B ITE Equipment (3m) An antenna is connected to a spectrum analyzer using a 20 meters coaxial cable to measure the radiated emission from an equipment under test (EUT), as shown in Figure Q9. The measurement distance is 10 meter. The loss of the coaxial cable is 0.2 dB and 0.32 dB per meter at 100 MHz and 250 MHz. The receiving antenna provides an output voltage at 0.62 V and 0.55 V for every V/m of incident electric field for 100 MHz and 250 MHz, respectively. The reading on the spectrum analyzer for both frequencies is 24 dBμV. (a) Determine the measured electric field strength at both frequencies in dBµV/m. (b) If the device is tested for compliance with CISPR 22 Class B, determine whether the device pass or fail the emission test. EUT 10m- Figure Q9 Frequency (MHz) 30-230 230-1000 -20m- dBμV/m 40.5 47.5 Spectrum Analyzer Table Q9: CISPR 22 Radiated Emission Limit for Class B ITE Equipment (3m) An antenna is connected to a spectrum analyzer using a 20 meters coaxial cable to measure the radiated emission from an equipment under test (EUT), as shown in Figure Q9. The measurement distance is 10 meter. The loss of the coaxial cable is 0.2 dB and 0.32 dB per meter at 100 MHz and 250 MHz. The receiving antenna provides an output voltage at 0.62 V and 0.55 V for every V/m of incident electric field for 100 MHz and 250 MHz, respectively. The reading on the spectrum analyzer for both frequencies is 24 dBμV. (a) Determine the measured electric field strength at both frequencies in dBµV/m. (b) If the device is tested for compliance with CISPR 22 Class B, determine whether the device pass or fail the emission test. EUT 10m- Figure Q9 Frequency (MHz) 30-230 230-1000 -20m- dBμV/m 40.5 47.5 Spectrum Analyzer Table Q9: CISPR 22 Radiated Emission Limit for Class B ITE Equipment (3m)

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To determine the measured electric field strength at both frequencies we need to first account for the cable loss and then convert the voltage measure... View the full answer